Dear fred,
Let's see. Bus exhaust smoke is probably even less safe than tobacco smoke, but then very few people try to smoke a bus. The extent of one's exposure to bus fumes is less than the exposure not only of a cigarette smoker themselves, but also of a passive smoker ( if a spouse is smoking, eg). And the effects are additive --- so if one smokes cigarettes, further exposure to bus and car fumes could add up to an even greater risk than for a non-smoker. Frankly, I feel that SA buses and taxis ought to carry large Health warnings of their dangers, too, but I doubt that we'll see that happen.
When you talk about "addiction" to chappies and cocacola, you may be talking about a psychological dependency, rather than an addiction, as neither of these two produce a true addiction, in which one suffers chemical ill-effects on stopping or reducing one's intake of them. But some of us are of what some folks call an Addictive Personality --- we tend to overdo things, and to become too readily dependent on too many things.
Now, when we get round to abuse, physicial or verbal, that is not to be tolerated, though we recognize the potential hazards of trying to leave such a cruel person. Check i your local phone book for the number, but urgently call POWA, People Against Woman Abuse, and they should be able to offer support and encouragement, and good practical advice on how to protect your safety and explore various ways to safeguard yourself.